Regensburg 2007 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 13: Cassini bei Saturn
EP 13.6: Vortrag
Donnerstag, 29. März 2007, 15:15–15:30, H46
The Cosmic Dust Analyser: Calibration revisited — •Ralf Srama2, Sascha Kempf1, Georg Moragas-Klostermeyer1, Frank Postberg1, and Eberhard Grün3 — 1Max-Planck-Institut Kernphysik, Heidelberg, Germany — 2MPI Kernphysik, Heidelberg and IRS, Univ. Stuttgart, Germany — 3MPI Kernphysik, Heidelberg, Germany and Univ. of Colorado, Boulder, USA
The Cosmic Dust Analyser (CDA) onbaord the spacecraft Cassini was switched in 1999 and is gathering data successfully until today. The detector monitored particles with sizes between 0.01 and 50 micrometer and with speeds between one and 300 km/s. Impacts of iron nickel particles, silicates and water ice particles were charactererised by the incorporated time-of-fliight mass spectrometer. Here, we revisit the calibration of the CDA instrument, which is based on ground based measurements at the dust accelerator facility in Heidelberg. The laboratory results are applied to and compared with in-flight measurements in the saturnian system. The well known properties of Saturn's E-ring particles allow for an in-flight calibration.